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Chemistry

Chemistry
Maximum permissible concentration of copper in drinking water in mg/L is

0.05
0.01
1
2

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Chemistry
Malathion is a/an

Pesticide
Fumigant
Preservative
Insecticide

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Chemistry
Liquid Nitrogen boils at

82 Kelvin
54 kelvin
97 Kelvin
77 kelvin

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Chemistry
White phosphorus is always kept under

Water
Ether
Kerosene
Benzene

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Chemistry
Which one of the following contributes largely to the ‘green house effect’ ?

Ozone
Water vapour
Carbon monoxide
Carbon dioxide

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Chemistry
Which of the following is used as filler in tyre of rubber ?

Graphite
Coke
Carbon black
Coal

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